Enhancement: Add search location filter

We've added the option to set the search location in the searchbar.

https://github.com/owncloud/web/pull/9304
https://github.com/owncloud/web/pull/9432
https://github.com/owncloud/web/pull/9456
https://github.com/owncloud/web/issues/9258
https://github.com/owncloud/web/issues/9428
https://github.com/owncloud/web/issues/9439
